Motor for oil-pumps and the like.



W. S. SHERMAN.

MOTOR FOB. OIL PUMPS AND THE LIKE.

APPLIDATION FILED DBO. 15, 1904. RENEWED JUNE 5, 1906.

Patented Jan. 19, 1909.

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WILLIS S. SHERMAN, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO SIGHT FEED OIL PUMP COMPANY, OF MIL'WAUKEE, WISCONSIN, A CORPORATION OF \VISCONSIN.

MOTOR FOR OIL-PUMPS AND TIIE LIKE.

To all whom it may concern:

Be it known that I, IVILLIS S. SHERMAN, residing in Milwaukee, in the county of Milwaukee and State of WVisconsin, have invented new and useful Improvements in Motors for Oil-Pumps and the Like, of which the following is description, refercnce being had to the accompanying drawings, which are a part of this specification.

This invention relates to motors for oil pumps and the like and has for its object to provide a means actuated by pulsations of fluid pressure for imparting motion to a mechanism such as an oil pump.

Another object of this invention is to adapt such a means for use in connection with the cylinder of a steam or explosive engine or other device in which pulsations of fluid pressure are present, so that a suitably arranged piston or its equivalent may be caused to receive motion from such pulsations of fluid pressure and communicate them to a pump or other device.

Another object of this invention is to arrange the piston of a device such as above mentioned so that it will cushion its reciproeating strokes.

Another object of this invention is to provide a novel means for returning the piston after its having received an impulse from the fluid pressure.

Another object of this invention is to provide means for returning to the active end of the cylinder water of condensation from steam which may pass the piston.

Another object of this invention is to provide means whereby the operating device may be actuated by hand.

Another object of this invention is to improve upon details of construction and the arrangement of parts in a device of the character above mentioned.

with the above and other objects in view the invention consists in the operating device, its parts and combinations of parts as herein set forth and the equivalents thereof.

Referring to the accompanying drawil'lgs in which like characters of reference indicate the same parts in the several views :Figure 1 is a vertical sectional view of an operating device for oil pumps and the like embodying this invention; Fig. 2 is an elevation thereof partly in section; Fig. 3 is a sectional view Specification of Letters Patent.

Application filed. December 15, 1904, Serial No. 236,961.

Patented Jan. 19, 1909.

Renewed June 5, 1906. Serial No. 320,341.

taken on the line 33 of Fig. 2; Fig. 4 is a sectional view of the tubular guide of the casing showing the packing adjusting means with parts broken away; and, Fig. 5 is a plan view of the same with the screw cap removed.

In these drawings 5 represents a shaft of some suitable means, not shown, to which it is desired to impart motion, such as an oil pump designed to force oil to an engine or pumping mechanism during the operation of said mechanism only, and 6 indicates a pipe or tube preferably having connection with a part of such mechanism, as the cylinder thereof. from which it may convey pulsations of fluid pressure to a cylinder 7 with which said pipe 6 is connected.

A casing 8 is threaded around the upper end of cylinder 7 and contains a tubular guide 9 receiving a trunk stem 10 of a piston 11 which slidingly fits within the cylinder 7. A suitable gland ring 12 fits around the trunk stem 10 into a recess extension 13 of the tubular guide 9 and is held tightly against the shoulder 14: of the casing by having its outer edge pressed upon by a shoulder 15 of the cylinder 7, so that it. is firmly clamped between the said shoulders.

The upper portion of the trunk stem 10 on one side thereof is provided with a series of rack teeth 16 which mesh with a segmental gear 17 forming a part of a hub 18 which is rigidly clamped upon the shaft 5 by means of a pair of set screws 19 at right angles to each other. The hub 18 is tubular and extends considerably to one side of the segmental gear 17, where it is drilled longitudinally at its edge to provide a groove 20 to tightly receive the looped end 21 of a clock spring 22 which is wound upon the hub 18 as a mandrel.

The casing 8 is formed into a cylindrical drum 23 which surrounds the segmental gear 17 and the spring wound hub 18, and has a bearing 24- therein for shaft 5 and an annular groove 25 in which one end of the hub 18 bears. A cap or cover 26 for the drum 2?) also forms a bearing 27 for the end of the shaft 5 and has the other end of the hub 18 hearing in an internal annular groove 28 thereof. The cover 26 is provided with an annular flange 29 fitting within the drum 23 and containing the clock spring 22, the outer looped end 30 of said clock spring being secured to said flange by fitting in a groove 31 in the inner surface of the flange formed by drilling therethrough, as with groove 20. The cover 26 is secured in position on the drum 23 by means of screws 32, which are four in number as here shown.

When the device is to be assembled the spring 22 is coiled and slipped into the flange 29 with its looped end 30 engaging in the groove 31, and then the segmental gear 17 is passed into the drum so that its hub 18 fits into the groove 25 and its teeth mesh with rack 16. Now the cover is placed in position on the drum, the inner looped end 21 of the spring 22 therein being first guided into the groove 20 of the hub and then the flange 29 is fitted within the drum and the cover is pressed into place so that the other end of the hub 18 fits in the groove 28 therefor in the cover. The desired tension may now be given to the spring 22 by turning the cover 26 by means of a wrench engaging the projecting wrench hold 36 thereof or by other suitable means and said cover is then clamped in position by means of the screws 32. The casing with its parts assembled may be slipped onto the end of shaft 5 of the oil pump and secured thereto by tightening one of the set screws 19 by means of a socket wrench passed through a slot 33 in the drum 23. The shaft 5 may then be turned by inserting any suitable tool through the slot 33 and into a tool socket 34:, which is formed in a boss 35 on the hub between the set screws 19, and swinging it so as to bring the other set screw 19 into a position where it may also be tightened by means of the socket wrench passed through the slot 33.

In order to overcome the tendency of the casing 8 to turn on the shaft 5 due to the pressure given it by the operation of the parts, a bolt eye 37 is formed on it at the opposite side of the guide 9 from the shaft 5, through which bolt eye a bolt or other means is adapted to pass to connect it with some rigid portion of the machinery with which it is used.

The pulsations of the fluid pressure in the engine or other device which are conveyed to the cylinder 7 by pipe 6 will force the piston 11 to slide upwardly in the cylinder 7 causing the rack 16 to turn the segmental gear 17 against the tendency of the spring 22 and so partially turn the shaft 5. When the pulsation of fluid pressure has ceased the spring 22 causes the segmental gear 17 to return the piston to the bottom of the cylinder by forcing the rack 16 downwardly, until another pulsation is received and the foregoing operation is repeated, thus giving to the shaft 5 a repeated oscillation as long as the mechanism to which it is attached continues its operation. A hand operation may be given to the device at any time by oscillating a tool inserted through slot 33 into tool socket 34, so as to rock the shaft 5 back and forth.

The piston 11 is formed with a depending cylindrical boss 38 which is adapted to snugly fit within a reduced portion 39 of the cylinder 7, so that air or steam entrapped between the annular shoulder d0 of the reduced portion 39 of the cylinder and the shoulder ll of the piston 11, where it changes its diameter, will be compressed to cushion the downward stroke of the piston. The upward stroke of the piston is gradually cushioned by the air contained in the cylinder above the piston being first forced through a passageway 42 through the trunk stem 10 to a chamber 1-3 formed therein by a drilled opening extending longitudinally of the trunk stem from its upper end, slightly eccentric thereto to avoid the rack teeth 16, which chamber is closed by a screw plug 44 threaded in its upper end. The air being forced into the chamber 43 through the passage 42 serves to retard the upward stroke of the piston and when the passage 12 passes beyond the gland ring 12 so as to be closed thereby the entrapped air above the piston is compressed to cushion the end of the upward stroke. Such steam that succeeds in working past the piston 11 into the upper part of the cylinder would by condensing be liable to interfere with the proper operation of the piston, ren dering the cushioning of the upper stroke thereof ineffective. In order that this effect may be avoided the cylinder 7 is provided in its interior near its upper end with one or more longitudinal. grooves of a length greater than the thickness of the piston proper 11, so that at the upward stroke of the piston, after the passage 42 has passed out of communication with the interior of the cylinder, the steam or other pressure fluid beneath the piston passes through said grooves 45 around the piston to the upper side thereof, where becoming entrapped after the piston passes beyond the upper ends of said grooves, it is compressed with the air above the piston to cushion the end of the piston stroke. Now, when the pressure heneath the piston is reduced. at the end of the pulsation received from the engine or the like, and the spring 22 starts the piston on its downward stroke, the pressure of the entrapped air and pressure fluid above the piston being greater than the pressure beneath the piston. they will escape through the grooves 45 to beneath the piston, carrying with them any water of condensation that may have accumulated in the cylinder above the piston. Soon after the grooves 45 have passed by the lower face of the piston the passage 42 is again brought into communication with the cylinder and the air within the chamber 43 returns to the cylinder to retard the upward stroke of the piston at the next pulsation.

In order that air may not escape between the trunk stem 10 and the tubular guide 9, a packing 46 surrounds said trunk stem within the recess 13 and is held tightly against the gland ring 12 by means of a gland ring 47, also contained within the recess 13. The gland ring 4-7 has a beveled lower edge to wedge the packing toward the trunk stem and is forced downwardly thereon by means of a pair of rods 18 fitting in vertical bores 49 through the walls of the tubular guide 9, which are provided with raised ribs 50 therefor. The lower ends of the rods 48 bear on the upper end of gland ring 4:? while their upper ends bear on the lower edge of a screw cap 51 which is threadedon the upper end of the tubular guide 9. By turning the screw cap 51 the rods 18 may be forced down upon a gland ring 47 to tighten the packing around the trunk stem, and the screw cap may be locked in its adjusted position by means of a locking pin 52 slidably fitting in the screw cap and adapted to engage with one or more notches 53 in the edge of the tubular guide.

Though the invention is described as having connection with the cylinder of an engine or the like, it is obvious that it may have direct connection with the exhaust of the engine or the inlet or outlet pipes of a pump and still receive pulsations of fluid pressure to effect its desired operation, which pulsations may be either pulsations of expansion or pulsations of suction. Therefore, the invention is not confined to the connection direct to the cylinder, but comprises such other connections that provide it with pulsations of fluid pressure and these are intended to be comprised within the terms of such expressions employed herein as having connection with the cylinder of an engine.

While a particular construction is herein shown and described as forming one embodiment of this invention, it is not to be understood that the invention is confined thereto, for other construction may involve the principles of the invention and constitute other embodiments thereof within the scope and protection of the claims, and many changes and alterations may be made in the construction of the embodiment of the invention herein shown and described, without departing from the spirit and scope of the invention.

That I claim as my invention is 1. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston working in the cylinder, a rack carried by the piston, and a gear meshing with the rack.

2. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston working in the cylinder, a rack carried by the piston, and a spring returned gear meshing with the rack and adapted to be operated by the movements of the piston due to the pulsations of fluid pressure.

3. In combination, a cylinder adapted. to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston working in the cylinder, a rack carried by the piston, a using in which the rack moves, a shaft journaled in the casing, and a gear on the shaft meshing with the rack.

1. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of the fluid pressure therefrom, a piston working in the cylinder, a rack carried by the piston, a casing in which the rack moves, a shaft journaled in the casing, a gear mounted on the shaft and meshing with the rack, and aretracting spring connected with the gear and with the casing.

5. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston working in the cylinder, a rack carried thereby, a casing in which the rack moves, a shaft journaled in the casing, a segmental gear mounted on the shaft and meshing with the rack, a hub on the segmental gear, a drum on the casing surrounding the segmental gear, a cover on the drum adapted to be socured thereto, and a spring connecting the cover with the hub, said cover being adapted to be turned to impart tension to the spring.

6. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, a rack carried by the piston, a casing through which the rack moves, a shaft journaled in the casing, a segmental gear mounted on the shaft and meshing with the rack, a drum on the casing sur rounding the segmental gear, a cover for the drum having an internal tlange, a hub on the segmental gear, and a coiled spring around the hub having looped ends fitting in grooves of the hub and the flange respectively.

T. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, a rack carried by the piston, a casing in which the rack moves, a shaft journaled in the casing, a segmental gear mounted on the shaft and meshing with the rack, a drum on the casing surrounding the segmental gear, a spring connecting the segmental gear with the drum, and a set screw threaded through the segmental gear to engage the shaft and exposed through an opening in the drum.

8. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, a rack carried by the piston, a casing in which the rack moves, a shaft journaled in the casing, a segmental gear mounted on the shaft and meshing with the rack, a drum on the casing surrounding the segmental gear, a spring connecting the segmental gear with the drum, a pair of set screws threaded through the segmental gear at approximately right angles to each other and engaging the shaft, and a tool hold on the segmental gear between the set screws, said set screws and tool hold being accessible through a slot in the drum.

9. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, a rack carried by the piston, a casing in which the rack moves, a shaft journaled in the casing, a segmental gear mounted on the shaft and meshing with the rack, a drum on the casing surrounding the segmental gear, a hub on the segmental gear, a spring surrounding the hub and connected thereto, a cover for the drum having an internal flange to which the spring is also connected, said cover being adapted to be turned in the drum to apply tension to the spring and forming a bearing for the shaft and the hub, and means for connecting the cover to the drum in its adjusted positions.

10. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, a rack carried by the piston, a casing in which the rack moves, a drum on the casing, a shaft journaled in the drum, a segmental gear mounted on the shaft and meshing with the rack, a hub on the segmental gear, a spring surrounding the hub and connected thereto, a cover for the drum forming a bearing for the shaft and the hub, an internal flange of the cover to which the spring is also connected, said cover being adapted to be turned in the drum to impart tension to the spring, means for connecting the cover to the drum in the position to which it is turned, a pair of set screws threaded through the segmental gear and engaging the shaft, and a tool hold on the segmental gear between the set screws, said tool hold and set screws being accessible through a slot in the drum.

11. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, means for receiving motion from the piston, and means for cushioning the movements of the piston in the cylinder.

12. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, means for receiving motion therefrom, and means for cushioning the movements of the piston comprising a reduced extension of the piston fitting in a contracted portion of the cylinder whereby an air trap will be formed at the end of the piston stroke,

13. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, means for receiving motion from the piston and means for cushioning the movements of the piston comprising a closed chamber having a passageway in communication with the cylinder.

14. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, a trunk stem on the piston passing through the cylinder, means for receiving motion from the trunk stem, and means for cushioning the movements of the piston comprising a closed chamber in said trunk stem having a passageway leading to the cylinder.

In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, a trunk stem 011 the piston passing through a wall of the cylinder, means for receiving motion from the trunk stem, and means for cushioning the movements of the piston comprising a closed chamber in the trunk stem having a passageway communicating with the cylinder at a short distance ahead of the piston whereby the air ahead of the piston will be compressed in said chamber until the passageway has passed the wall of the cylinder when an air trap will be formed in the cylinder at the end of the piston stroke.

16. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, a trunk stem on the piston, a casing threaded to the cylinder and having a passageway for the trunk stem, a gland ring surrounding the trunk stem and clamped between the cylinder and the casing, a gland packing held against the trunk stem and the casing by the gland ring to form an air tight joint therebetween, means for receiving motion from the trunk stem, and means for cushioning the movements of the piston comprising a chamber in the trunk stem closed by a screw plug threaded in the end thereof, said chamber having a passageway connecting with the interior of the cylinder a short distance ahead of the piston whereby air will be compressed by the piston in the chamber until the passageway is closed by the gland ring when an air trap will be formed in the cylinder at the end of the piston stroke.

17. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, a trunk stem on the piston passing through the cylinder, means for receiving motion from the trunk stem, and a means for cushioning the movements of the piston comprising a reduced extension of the piston on one side thereof fitting in a reduced portion of the cylinder to form an air trap on that side of the piston at the end of its stroke and a closed air chamber in the trunk stem having a passageway connecting it with the cylinder a short distance ahead of the other side of the piston, whereby air will be compressed by the piston in the chamber until the passageway is closed by the cylinder and then an air trap will be formed on this side of the piston at the end of the piston stroke.

18. In combination, a means adapted to have communication with the cylinder of an engine or the like and sensitive to pulsations of fluid pressure received therefrom, a mechanism for receiving motion from said means, and means by which said mechanism may be operated by hand.

19. In combination, a reciprocating member, a casing forming a guide therefor, a drum on the casing, a cover for the drum, a hub journaled in the drum and the cover, and means on the hub for engaging the reciprocating member, said hub being adapted to engage the machinery to be operated.

20. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, and means for receiving motion from the piston, said cylinder being provided with a groove longer than the thickness of the piston through which water of condensation may be discharged.

21. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, and means for receiving motion from the piston, said cylinder having a groove in its interior located a short distance from one end of the cylinder whereby both sides of the piston are brought into communication with each other in one position of the piston while the movement of the piston beyond that position forms a trap for cushioning the end of the piston stroke, said groove serving to allow of the discharge of water of condensation from the cylinder.

22. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, means for receiving motion from the piston, and a chamber having communication with the cylinder adapted to be shut off by the movements of the piston, said cylinder having a groove in its inner surface to cause the opposite sides of the piston to have communication with each other after the communication to the chamber has been shut off, said groove permitting the discharge of water of condensation from the cylinder.

In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, a trunk stem on the piston passing through the cylinder, means for receiving motion from the trunk stem, and a chamber located in the trunk stem and having a passageway communicating with the cylinder at a distance beyond the piston, said cylinder having a groove in its inner surface at a shorter distance from the end of the cylinder than the distance between the passageway and the piston by means of which both sides of the piston are brought into communication after the passageway passes out of the cylinder, the further movement of the piston serving to form a trap beyond the groove to cushion the end of the piston stroke, said groove serving to permit of the discharge of water of condensation from the cylinder on the return stroke of the piston.

24-. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, a stem 011 the piston passing through the cylinder, means for receiving motion from the stem, a casing through which the stem passes, a packing gland in the casing around the stem, a packing in said gland, a gland ring bearing on the packing, a pair of rods passing through an opening in the casing and bearing on the gland ring, and means for tightening the gland ring against the packing by means of said rods.

25. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, a stem on the piston, a gland ring surrounding the stem and closing the cylinder, a casing clamping the gland ring to the cylinder, a recess in the casing, a packing in the recess around the stem, a second gland ring in the recess bearing on the packing, a pair of rods slidably mounted in openings through the casing, and means for tightening the gland ring against the packing by means of said rods.

26. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, a stem on the piston, a gland ring surrounding the stem and seated on a shoulder of the cylinder to close the end of the cylinder, a casing receiving the stem and clamping the gland ring against the cylinder, a packing in a recess of the casing and bearing on the gland ring, a second gland ring in the recess having a beveled edge to force the packing against the stem, a pair of rods slidably mounted in bores of the easing, a screw cap threaded on the casing and adapted to force the rods against the second mentioned gland ring to tighten the packing aroimd the stem, and a pin fitting through an opening in the screw cap and adapted to engage notches in the casing to prevent the screw cap moving out of its adjustment.

27. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, means for receiving motion from the piston, and means for connecting both sides of the piston together in one position thereof to allow of the discharge of water of condensation from the cylinder.

28. In combination a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, means for receiving motion from the piston, and means for connecting both sides of the piston together before the piston has reached the end of its stroke, whereby the water of condensation may be discharged from the cylinder.

29. In combination, a cylinder adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, means for receiving motion from the piston, a chamber having communication with the cylinder adapted to be shut off by the movements of the piston, and means for connecting the opposite sides of the piston together when the communication of the chamber is shut off, whereby water of condensation may be discharged from the cylinder.

30. In combination, a casing, a cylinder on the casing adapted to have communication with the cylinder of an engine or the like and receive pulsations of fluid pressure therefrom, a piston operating in the cylinder, a stem on the piston passing through the casing, means for receiving motion from the stem, a packing in the casing surrounding the stem, a gland ring bearing on the packing, rods passing through openings in the casing and engaging the gland ring, and a screw mounted on the casing and adapted to bear on the rods to cause them to press the gland ring against the packing and tighten the packing around the stem.

31. In combination, an engine cylinder, a cylinder communicating therewith, a piston located therein and sensitive to pulsations of fluid pressure received from said engine cylinder, a shaft and means for transmitting oscillatory motion to said shaft from said piston.

32. In combination with an engine cylinder, a cylinder communicating therewith and receiving motive fluid therefrom, a piston located within said cylinder sensitive to pulsations of pressure within said engine cylinder and means for establishing communication between the portions of said cylinder on each side of said piston before said piston has reached the end of its stroke, whereby the water of condensation may be discharged from said cylinder.

In testimony whereof, I aiiiX my signature, in presence of two witnesses.

WILLIS S. SHERMAN.

l/Vitnesses R. S. C. CALDWELL, ANNA F. SCHMIDTBAUER. 

